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The angles which one straight line makes with another upon one side of it, are either two right angles, or are together equal to two right angles.
The school Euclid: comprising the first four books, by A.K. Isbister - Σελίδα 15
των Euclides - 1862
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## The Elements of Euclid: The Errors, by which Theon, Or Others, Have Long Ago ...

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...Book!. Let the ftraight line AB make with CD, upon one fide of it, the Vxv^ angles CBA, ABP ; thefe are either two right angles, or are together equal to two right angles. a. Def. 10. For if the angle CBA be equal to ABD, each of them is a right ^ E ri Ax. di Ax. B B angle....

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...PROPOSITION XIII. THEOREM FI. HF angles which one ftraight line FC makes with another AB upon pre fide of it, are either two right angles, or are together equal to two right angles. Hypothefis. Thefis. EC is aßraight line meeting I. Either each of У ACE, ECB, is a L.. AB in the...

## The Elements of Euclid, Viz: The Errors, by which Theon, Or Others, Have ...

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...t. Book I. Let the ftraight line AB make with CD, upon one fide, of it, the angles CBA, ABD ; thefe are either two right angles, or are together equal to two right angles. For, if the angle CBA be equal to ABD, each of them is a. A A i. Ax. a Def. to. r;ght » angle ; but,...

## Elements of Geometry: Containing the First Six Books of Euclid, with Two ...

John Playfair - 1795 - 444 σελίδες
...PROP. XIII. THEO R. THE angles which one ftraight line makes with. another upon the one fide of it, arc either two right angles, or are together equal to two right angles. . Let the ftraight line AB make with CD, Upo-1 one fide of ui the angles CBA, ABD ; thefe ar. euher...

## The Elements of Euclid: Viz. the First Six Books, with the Eleventh and ...

Alexander Ingram - 1799 - 351 σελίδες
...done. PROP. XIII. THEOR. THE angles which one ftraight line makes with another upon the one fide of it, are either two right angles, or are together equal to two right angles. Let the flraight line AB make with CD, upon one- fide of it, the a 5.Poft. b i0. i. BooK I. the angles...

## The Elements of Euclid: Also the Book of Euclid's Data ...cor. viz. The ...

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...angles. Poft Let the ftraight line AB make with CD, upon one fide of it* the angles CBA, ABD ; thefe are either two right angles, or are together equal to two right angles. a. Def. 10. For if the angle CBA be equal to ABD, each of them is a right • AE b. it. I. c. 2. Ax....

## Elements of Geometry;: Containing the First Six Books of Euclid, with a ...

John Playfair - 1804 - 470 σελίδες
...PROB. XIII. THEO R. THE angles which one ftraight line makes with another upon the one fide of" it, are either two right angles, or are together equal to two right angles. Let the ftraight line AB make with CD, upon one fide of it, the angles CBA, ABD ; thefe are either...

## The Elements of Euclid: Viz. the First Six Books, Together with the Eleventh ...

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...I.. Let the straight line AB make with CD, upon one side v-*"V-' of it, the angles CBA> ABD : these are either two right angles, or are together equal to two right angles. • * For if the angle CB A be equal to ABD, each of them is a % A ' E DB D B C 1 Def. 10. right4 angle;...

## Elements of Geometry: Containing the First Six Books of Euclid, with a ...

Euclid, John Playfair - 1819 - 348 σελίδες
...done. PROP. XIII. THEOR. The angles which one straight line makes with another upon one side of it, are either two right angles, or are together equal to two right angles. Let the straight line AB make witK CD, upon one side of it, the angles CBA, ABD ; these are either...

## The Elements of geometry [Euclid book 1-3] in general terms, with notes &c ...

Euclides - 1821 - 294 σελίδες
...former (per 8th ) PROP. 13, THEOR. WTten a right line standing upon another makes angles with it, they are either two right angles or are together equal to two right angles, If the right line standing on the other be perpendicular to it, the angles are both right ; if not,...